From 4537a687f8a5f669076da8189c4a133a2842db02 Mon Sep 17 00:00:00 2001
From: weisj <31143295+weisJ@users.noreply.github.com>
Date: Fri, 6 Aug 2021 14:42:55 +0200
Subject: [PATCH] InternalFrame: Hide shadow border if not inside a
 JDesktopPane

---
 .../ui/internalframe/DarkInternalFrameBorder.java     | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/core/src/main/java/com/github/weisj/darklaf/ui/internalframe/DarkInternalFrameBorder.java b/core/src/main/java/com/github/weisj/darklaf/ui/internalframe/DarkInternalFrameBorder.java
index 4777669a1..6f0089b3c 100644
--- a/core/src/main/java/com/github/weisj/darklaf/ui/internalframe/DarkInternalFrameBorder.java
+++ b/core/src/main/java/com/github/weisj/darklaf/ui/internalframe/DarkInternalFrameBorder.java
@@ -52,7 +52,7 @@ public DarkInternalFrameBorder() {
     @Override
     public void paintBorder(final Component c, final Graphics graphics, final int x, final int y, final int width,
             final int height) {
-        if (c instanceof JInternalFrame && ((JInternalFrame) c).isMaximum()) {
+        if (shouldHideShadow(c)) {
             return;
         }
         updateOpacity(c);
@@ -69,10 +69,17 @@ protected void updateOpacity(final Component c) {
 
     @Override
     public Insets getBorderInsets(final Component c) {
-        if (c instanceof JInternalFrame && ((JInternalFrame) c).isMaximum()) {
+        if (shouldHideShadow(c)) {
             return new InsetsUIResource(0, 0, 0, 0);
         }
         updateOpacity(c);
         return super.getBorderInsets(c);
     }
+
+    private boolean shouldHideShadow(final Component c) {
+        if (!(c instanceof JInternalFrame) || ((JInternalFrame) c).isMaximum()) {
+            return true;
+        }
+        return !(c.getParent() instanceof JDesktopPane);
+    }
 }